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USB (COM) 轉 RS485 模組
USB connect to PC
A and B : the RS485 pair
Connect to RS485 Device
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DI (data in) to pin 1 (D1) TX
RO (receive out) to pin 0 (D0) RX
DE (data enable)
RE (receive enable) jumpered together and to
DE pin 7 (D7)
Vcc 5V and Gnd connected (5V Gnd)
A and B : the RS485 pair
RS485 轉UART (TTL (RX/TX) 模組
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MQTT (Message Queuing Telemetry Transport),它是為IBM和Eurotech共同
製定出來的protocol,在MQTT的官網可以看到它對MQTT的介紹:
MQTT is a machine-to-machine (M2M)/”Internet of Things” connectivity
protocol. It was designed as an extremely lightweight publish/subscribe
messaging transport.
所以它是為了IOT而設計的protocol,它是基於TCP/IP的協定,並且透過
publish/subscribe的方式做資料傳送與接收。
它的架構如下圖:
MQTT簡介
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Container 列表
Blockly Blockly is a library for building visual programming editors.
Dashing Dashing is a Sinatra-based framework that lets you build beautiful dashboards.
Freeboard A Open Source Dashboard.
Intel Edison Intel® Edison technology is a hardware and software platform that, when
combined with sensors and your imagination, empowers you to invent new Internet-
enabled products and solutions.
Kafka Apache Kafka is a publish-subscribe messaging rethought as a distributed commit
log.
MariaDB MariaDB is a community-developed fork of the MySQL relational database
management system intended to remain free under the GNU GPL.
MongoDB MongoDB (from humongous) is a cross-platform document-oriented database.
Node-RED Node-RED is a tool for wiring together hardware devices, APIs and online
services in new and interesting ways.
Ponte Ponte allows you to publish and receive data using any protocol: HTTP, MQTT and
CoAP.
RabbitMQ Robust messaging for applications.
Redis Redis is a data structure server. It is open-source, networked, in-memory, and
stores keys with optional durability.
RPI The Raspberry Pi is a series of credit-card-sized, single-board computers developed in
the United Kingdom by the Raspberry Pi Foundation with the intent to promote the
teaching of basic computer science in schools and developing countries.